Multi-technique SAR Coseismic Deformation Retrieval and Fault Modeling of the 2025 Mw 7.7 Myanmar Earthquake

On 28 March 2025 at 06:20 UTC, a major earthquake of Mw 7.7 occurred in central Myanmar, with its epicenter located along the central segment of the Sagaing Fault, one of the main tectonic structures in Southeast Asia (Bradley & Hubbard, 2025; Vera et al., 2025). The event, characterized by a shallow hypocenter (~10 km), generated intense ground shaking (Modified Mercalli Intensity IX) in densely populated areas, causing significant casualties and widespread infrastructural damage. Effects were felt at distances exceeding 1000 km from the epicentral area, likely related to local seismic amplification controlled by geological conditions (Shahzada et al., 2025). The rupture propagated for approximately 90 s along a ~490 km fault segment, suggesting supershear dynamics, as confirmed by teleseismic data (Vera et al., 2025; Melgar et al., 2025). Twelve minutes after the mainshock, an Mw 6.7 aftershock occurred, likely triggered by static stress changes induced by the main event (USGSa, 2025).